From 0e4a398ab2c5e9b540a80859ec28163b65e7a891 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Wed, 14 Mar 2012 15:37:53 +0000
Subject: [PATCH] ARM: Remove unnecessary subpage workarounds
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In the ARM per-CPU peripherals (GIC, private timers, SCU, etc),
remove workarounds for subpage memory region read/write functions
being passed offsets from the start of the page rather than the
start of the region. Following commit 5312bd8b3 the masking off
of high bits of the address offset is now harmless but unnecessary.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Andreas Färber <afaerber@suse.de>
---
 hw/arm11mpcore.c | 2 --
 hw/arm_gic.c     | 8 ++++----
 hw/arm_mptimer.c | 2 --
 3 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/hw/arm11mpcore.c b/hw/arm11mpcore.c
index c67b70f3b9..ba6a89d3ed 100644
--- a/hw/arm11mpcore.c
+++ b/hw/arm11mpcore.c
@@ -42,7 +42,6 @@ static uint64_t mpcore_scu_read(void *opaque, target_phys_addr_t offset,
 {
     mpcore_priv_state *s = (mpcore_priv_state *)opaque;
     int id;
-    offset &= 0xff;
     /* SCU */
     switch (offset) {
     case 0x00: /* Control.  */
@@ -63,7 +62,6 @@ static void mpcore_scu_write(void *opaque, target_phys_addr_t offset,
                              uint64_t value, unsigned size)
 {
     mpcore_priv_state *s = (mpcore_priv_state *)opaque;
-    offset &= 0xff;
     /* SCU */
     switch (offset) {
     case 0: /* Control register.  */
diff --git a/hw/arm_gic.c b/hw/arm_gic.c
index d8a7a190e8..6b34c06a8f 100644
--- a/hw/arm_gic.c
+++ b/hw/arm_gic.c
@@ -658,14 +658,14 @@ static uint64_t gic_thiscpu_read(void *opaque, target_phys_addr_t addr,
                                  unsigned size)
 {
     gic_state *s = (gic_state *)opaque;
-    return gic_cpu_read(s, gic_get_current_cpu(), addr & 0xff);
+    return gic_cpu_read(s, gic_get_current_cpu(), addr);
 }
 
 static void gic_thiscpu_write(void *opaque, target_phys_addr_t addr,
                               uint64_t value, unsigned size)
 {
     gic_state *s = (gic_state *)opaque;
-    gic_cpu_write(s, gic_get_current_cpu(), addr & 0xff, value);
+    gic_cpu_write(s, gic_get_current_cpu(), addr, value);
 }
 
 /* Wrappers to read/write the GIC CPU interface for a specific CPU.
@@ -677,7 +677,7 @@ static uint64_t gic_do_cpu_read(void *opaque, target_phys_addr_t addr,
     gic_state **backref = (gic_state **)opaque;
     gic_state *s = *backref;
     int id = (backref - s->backref);
-    return gic_cpu_read(s, id, addr & 0xff);
+    return gic_cpu_read(s, id, addr);
 }
 
 static void gic_do_cpu_write(void *opaque, target_phys_addr_t addr,
@@ -686,7 +686,7 @@ static void gic_do_cpu_write(void *opaque, target_phys_addr_t addr,
     gic_state **backref = (gic_state **)opaque;
     gic_state *s = *backref;
     int id = (backref - s->backref);
-    gic_cpu_write(s, id, addr & 0xff, value);
+    gic_cpu_write(s, id, addr, value);
 }
 
 static const MemoryRegionOps gic_thiscpu_ops = {
diff --git a/hw/arm_mptimer.c b/hw/arm_mptimer.c
index 361e887dec..df7fb4c9bd 100644
--- a/hw/arm_mptimer.c
+++ b/hw/arm_mptimer.c
@@ -97,7 +97,6 @@ static uint64_t timerblock_read(void *opaque, target_phys_addr_t addr,
 {
     timerblock *tb = (timerblock *)opaque;
     int64_t val;
-    addr &= 0x1f;
     switch (addr) {
     case 0: /* Load */
         return tb->load;
@@ -126,7 +125,6 @@ static void timerblock_write(void *opaque, target_phys_addr_t addr,
 {
     timerblock *tb = (timerblock *)opaque;
     int64_t old;
-    addr &= 0x1f;
     switch (addr) {
     case 0: /* Load */
         tb->load = value;